Truck dumping mechanism



June 6, 1950 c. R. GOLAY 2,510,814

TRUCK DUMPING MECHANISM Filed Feb. 15,1948 2 Shees-Sheet 1 .Z'IVVAWTOR 044 745.? 6014; I

41 ram EX! June 6, 1950 c, GOLAY 2,510,814

TRUCK DUMPING MECHANISM Filed Feb. 13, 1948 2 Sheets-Sheet 2 INVENTOR. CPI/1H5:- Z? 6014) Patented June 6, 1950 UNITED STATES PATENT OFFICE 7 Claims.

This invention relates to a novel and improved elevating hoist for vehicle dumping bodies of which the following is a specification.

The primary object of this invention resides in the provision of an elevating hoist which combines the straight push principle of a hydraulic ram with a fixed arm to achieve a greater dumping angle than has been heretofore attained in such hoists. For the most part the elevating hoists now in use depend entirely on the stroke of a hydraulic ram for their elevation whereas my hoist uses, together with the ram extension, the length of the ram cylinder as an elevating medium.

Another object of this invention lies in the provision of a fixed arm hoist as set forth which, rather than being placed conventionally to act on the rear of the body where the bed lifts heaviest, may be turned around to act beneath the lighter, more easily lifted, forward end of the bed, and to gain the additional benefit of a greater dumping angle.

Still another object of this invention is the provision of an elevating hoist which is a small and compactunit folding into a minimum of space beneath the body, and one which is provided with body and frame supporting members adjustable to various dimensioned frames and bodies.

Still a further and important object of this invention lies in the provision of a dumping body hoist of the character set forth which is highly durable, extremely simple of construction, and therefore inexpensive of manufacture and installation.

Still further improvements and advantages of this invention will readily appear to those skilled in the art when the following description is read in the light of the accompanying drawings.

In'the drawings:

Fig. 1 is a perspective view of that portion of the hoist mechanism attached to and supported by the Vehicle body.

Fig. 2 is a perspective view of that portion of the hoist attached to and supported by the vehicle frame.

Fig. 3 is a view in side elevation of the portions illustrated in Figs. 1 and 2 in the cooperative positions they assume when the body is elevated, with an intermediate elevated position being shown in dotted line.

Fig. 4 is a View in perspective of a modification of the hoist in an intermediate elevated position, the parts being shown in full line, with a position of greater elevation being shown in dotted line.

Referring now to the accompanying drawings which are illustrative of the preferred embodi ments of my invention and in which like characters indicate similar parts throughout, A desig nates the conventional spaced girder frame, and B the body sills, of a common type dumping vehicle in which the body sill is supported on the frame and is pivotally secured transverse the rear end thereof thereby permitting the tilted elevation of the forward end of the sill above the frame.

In order to raise and lower the dumping body relative to the frame an elevating hoist is pro-- vided to act cooperatively between the body and.

the frame. This hoist is automatically, selectively operated through the medium of a hy-. draulic ram cylinder I in which the ram piston 2;

is selectively extended or retracted by the operation of a pump or the like carried, usually, in

the vehicle cab and interconnected with the ram suitably pivoted on a pin 6 which in turn is horizontally supported between the ears 5.

A pair of elongated arms I are rigidly inter connected in parallel spaced relationship by joiner plates 8, disposed intermediate their length,

and a pair of tubular casings I! which traverse their remote ends.

pivotation on a pin 9 which extends through one of the tubular casings II to be secured at each end thereof to transversely opposed points on the frame A. The pin 9 is secured transverse the frame A at such a distance rearward from, the.

beam 4' so as to dispose the casing I I, which traverses the now free ends of the arms 7, directly above the free end of the ram cylinder I when both the cylinder and the arms are substantially horizontally disposed.

The extensible end of the ram piston 2 is pivotally secured on the tubular casing ll traversing the forwardly'disposed free ends of the arms I,

and a pin I0 is revolubly inserted through the casing I I to project for a spaced distance through and beyond the outer faces of the arms I. A pair i ofcircular rollers I2, composed of a suitable durable material, are secured one to each of the end portions of the pin I0 where they project beyond the sides of the arms I. A

These arms 1 are disposed i longitudinally with and intermediate the sides of the frame A where they are mounted for vertical The foregoing completes the detailed description of the frame supported portion of the hoist assembly and the following is directed to the cooperative portion of the hoist supported by the body of the vehicle.

A pair of cross beams 28, provided with extensions 20a telescopically supported one in each of the ends thereof, are supported transverse the underside of the body in longitudinally spaced relationship by means. of L-shaped sill attaching-- plates 2| carried one by each of the extensions 20a. neath the body in predetermined spaced relationship that the forwardmost beam. will be dis: posed immediately forward of the vertical plane of the rollers l2 when all parts are in a substantially horizontal position A pair of spaced, parallel, inverted L girders 22 are longitudinally disposed beneath the body rigidly interconnecting the two cross beams 20.

A pair of guide tracks for the rollers l2- are formed by the rig-id attachment of a pair of vertica-lly-spaced, elongatedplates 23 and 24 longitudinally beneath each ofthe inverted L girders 2-2: These track forming plates 23 and 24- extend longitudinally paral-lelwith, and beneath, the L girders Zilfrom abutting positionswith the forward cross beanrZll to a point substantially twothirds of-the length of the girders 22 where the reputed remaining third portion of the plates is depressed at a predetermined-angle fromthe hori zorital to terminate at, points beneath th horizontal plane of the body sill.

In assembling the hoist. the rollers l2 are admitted one to eachofthe guide tracks formed by thespacedpairs ofl la l esfiaand 2s and the cross beamsl ll are .thensecuredto the sill members, in

the manner described, in a relative position longitudinal of, the bcdwas.described, so as to dispose the rollers 2. at the foremost ends of the tracks against the forward cross beam 20 when the body is in anormal lowered,- horizontal posiion ent e am In the elevating operationof the .-disclosedhoistthe ramcylinder is--charged--,tocause theextension-,of-,-the ram piston- 2- which, being;pivotally secured to the fixed 1;;wi-ll move: with the armsand the-cyl-inder through anincreasing vertical are from the horizontal.

The rollers; !-2, carried by-the arms. l in the bodysupported guide tracks, will bear upwardly against the track. top with an increaseinelevation; of; the, ramand cylinder causing a tilting forge to-be exerted beneath: the. body above. the framethe frame supported ram assembly contii' ues-upwardlyinits arc the rollers l2 will move rearward-l .in thenow. inclining track causing a continual increaseoin thebody elevation proportionalwith the elevation'o-f the ram -assembly.

When-the rollers enter the angular portion of thepermittingithe. attainment of a body elevation.

angle greater thanhasibeen heretofore achieved byseley-ating hoistsused forthe purpose specified.

The lowering operation of the body is converse.

These cross beams are so secured be;

to the raising operation described, as will be readily apparent.

In the hoist modification, as illustrated in Fig. 4, the ram cylinder I and the arms 1 are secured to and supported by the frame in the same manner as previously illustrated and described.

However, replacing the roller [2 on the pin H], which traverses the now rearward ends of the arms I, are a pair of short link bars 50 which are each'piyotally supported, at one of their ends on the opposed, extended. ends of the Pin ill to be normally suspended vertically therefrom.

A shaft 5| is rigidly, horizontally, supported between-the lipl; bars 5! intermediate their length, and the outer extensible end of the ram piston ispivotallysecured on this shaft intermediate the, ends hereo The lower, extreme ends of the link bars 50 are. rigidly interconnected by a second pintle 52 to which one pair of ends of a second pair of link bar are pivotally secured in spaced apart relationship.

operates on the same principle as the preferred:

embodiment in. that, it utilizes a fixed arm to bring. the length of the ram cylinder into playas anadditional elevating member. This form also utilizes a. linkage arrangement which increases the angle of elevation attainable over that made possible-by the previously described embodiment.

In this. modified form the link bars 5%l'and 53 are so arranged in the assembly as to increase theangle of elevation over the'preferred embodi- H ment in that they form the two sides of an obtuse;

triangle .between the fixed arms and-the body of which the direct linkage betweenthese elements, as in the preferred embodiment, constitutes the hypotenuse.

when these two linlrbars, forming the sides of the: obtuse triangle, are brought into alignmentand; applied asa single lifting medium they are of a greater linear magnitude than would be a.

straight interconnection which would constitute the hypotenuse of this triangle.

The dotted line, intermediate lift position of' thehoist illustrated as a part of Fig. 4 will clarify an understanding of the lifting action of this modified embodiment.

From the foregoing description and explanation itzis seen that an improved elevation hoist for any type of dumping body vehicle is provided which is adjustableto dumping vehicles of various sizes and constructions and a hoist of improved-operation functioning to attainan improved result.

I wish it understood that I contemplate any changes and modifications which fall within the scope of'the appended claims in which I desire to claim:

What I claim is:

1-. An elevating hoist for vehicle dumping bodies comprising, in combination, a Vehicle frame, adumping body pivoted on the frame transverse one end thereof, a'pin supported transverse the frame, a reciprocal element pivoted on the pin, a second pin supported transverse the frame, at a spaced distancefrom the first named pin, a-n..arm pivoted. at one .end on said second.

The second pair of ends of the spaced link bars are revolubly secured on an;

Thus from common mathematical: k ,ow-ledg eit may be readily understood that pin, the free ends of the reciprocal element and the arm revolubly secured. on a common pivot, rollers revolubly supported by the free end of the arm in transverse spaced relationship, a guide track for said rollers supported longitudinally beneath the body, said rollers movably confined within the limits of said guide track, and means for reciprocating the reciprocal element.

2. An elevating hoist for vehicle dumping bodies comprising, in combination, a vehicle frame, a dumping body pivoted on the frame transverse the rear end thereof, a pin supported transverse and intermediate the length of the frame, a hydraulic ram cylinder provided with an extensible ram piston, the base of said cylinder pivoted on said pin, a pair of rigidly interconnected parallel arms, a pin revolubly supported transverse one pair of ends of said arms, said pin being rigidly secured transverse the frame rearwardly from said ram supporting pin, a third pin traversing the second pair of ends of said parallel arms, the ram of the ram cylinder revolubly secured on said last named pin, circular rollers revolubly mounted one on each remote end of said last named pin, parallel spaced guide tracks supported longitudinally beneath the body in which said rollers are movably confined, and means for charging the hydraulic ram for the purpose described.

3. A structure as defined in claim 2 wherein, an S beam is rigidly secured transverse and intermediate the length of the frame, a pair of horizontally spaced ears are rigidly secured to the rearward face of said 8 beam, and said cylinder supporting pin being horizontally supported by and between said ears.

4. A structure as defined in claim 2 wherein, a pair of hollow beams provided with telescopically projected extensions are secured transverse the underside of the vehicle body by means of sill attaching plates carried one by each of said extensions, a pair of spaced parallel girders rigidly interconnect said hollow beams, a pair of elongated vertically spaced plates are secured longitudinally beneath each of said girders in abutment with the forward cross beam, a predetermined portion of these plates adjacent the rear end thereof being angularly depressed from the horizontal, said pairs of plates forming a guide track for the arm supported rollers substantially as and for the purpose described.

5. An elevating hoist for vehicle dumping bodies comprising, in combination, a vehicle frame, a dumping body pivoted on the frame transverse the rear end thereof, a reciprocal element ivoted on the frame, an arm pivoted on the frame at a spaced distance from the reciprocal element, a link bar having one end pivoted to that end of the arm remote to the frame, that end of the reciprocal element remote to the frame being pivoted on said link bar intermediate the length thereof, a second link bar pivoted at its remote ends to the dumping body and that end of the first named link bar remote to the arm respectively, and means for reciprocating the reciprocal element.

6. An elevating hoist for vehicle dumping bodies comprising, in combination, a vehicle frame, a dumping body pivoted on the frame transverse the rear end thereof, a pin supported transverse and intermediate the length of the frame, a, hydraulic ram cylinder and ram piston, the base end of said cylinder pivoted on said pin, a pair of rigidly interconnected parallel arms, a second pin rigidly secured transverse the frame rearward of said ram supporting pin, one pair of said arms being pivotally supported on said second pin, a third pin traversing the second pair of ends of said parallel arms, a pair of link bars revolubly suspended by one pair of ends from said last named pin, a shaft interconnecting said links intermediate their length, the outer end of the ram revolubly supported on said shaft, a second shaft interconnecting the second remote ends of the links, a second pair of spaced link bars revolubly connected at their remote ends to said last named shaft and a third shaft rigidly supported transverse the underside of the body respectively, and means for charging said hydraulic ram substantially as and for the purpose described.

7. An elevating hoist for vehicle dump bodies comprising in combination, a horizontally dis posed elongated vehicle frame, a dumping body horizontally pivoted on the frame adjacent the rear end thereof, a reciprocably extensible element having an end horizontally pivoted on the frame at a point forward of and remote to the pivotal connection of the body to the frame, an arm having an end horizontally pivotally connected to the frame at a point intermediate the pivotal connection of the body and the reciprocable element to the frame, means operatively and pivotally interconnecting the free ends of the reciprocable element and said arm, means operatively linking the interconnected reciprocable element and arm with the body, and means for reciprocating and extending the reciprocable element.

' CHARLES R. GOLAY.

REFERENCES CE'IED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,726,797 Barrett Sept. 3, 1929 1,944,414: Eisenberg Jan. 23, 1934 2,143,546 Day Jan. 10, 1939 2,210,143 Day Aug 6, 1940 2,319,840 Barrett May 25, 1943 2,332,961 Wood Oct. 26, 1943 

